Mobile systems characterize by dynamic environments, thus requiring adaptive and context aware mechanisms to perceive changes in the execution context and to dynamically adapt to them. We propose a framework for devel...
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ISBN:
(纸本)9781605581668
Mobile systems characterize by dynamic environments, thus requiring adaptive and context aware mechanisms to perceive changes in the execution context and to dynamically adapt to them. We propose a framework for developing adaptive context aware applications which employs aspect-oriented techniques and dynamic composition to modularize the adaptive behavior and to keep apart the application logic from this behavior. Copyright 2009 acm.
Virtualization is an essential enabling technology for building and controlling computing frameworks that can dynamically adapt available physical resources to transient tasks such as the temporary creation of a virtu...
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ISBN:
(纸本)9781605581668
Virtualization is an essential enabling technology for building and controlling computing frameworks that can dynamically adapt available physical resources to transient tasks such as the temporary creation of a virtual computing center tailored to the needs of a virtual organization. In this paper we will report on our strategy for the creation of virtual computer clusters based on standard Service-Oriented Architecture (SOA) and hosts virtualization technologies. We will describe our infrastructure designed for dynamical allocation of resources to applications via a general control plane based on workflows of coordinated web services. the control plane is based on logically independent services that are responsible for physical resource management and virtual nodes deployment. the control plane is also responsible for operations on virtual clusters such as their creation, startup and control. Copyright 2009 acm.
this paper presents the MoMPt project, an open source project developed to allow access to multimedia content and to control multiple HTPCs remotely using mobile devices. the main contribution in the context of this p...
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ISBN:
(纸本)9781605581668
this paper presents the MoMPt project, an open source project developed to allow access to multimedia content and to control multiple HTPCs remotely using mobile devices. the main contribution in the context of this project is its reference design, which allows the access of HTPC functionalities using different technologies, such as UPnP and XML-RPC. In this paper the reference design as well as its main components are detailed. Also, we describe one developed solution for the MediaPortal HTPC. It is discussed how it was developed, and the evaluation scenario with mobile devices, more specifically an Internet Tablet. Copyright 2009 acm.
Cloud computing is gaining popularity to the extent that the new "XaaS" service category introduced will gradually take the place of many types of computational and storage resources used today. In this rega...
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ISBN:
(纸本)9781605581668
Cloud computing is gaining popularity to the extent that the new "XaaS" service category introduced will gradually take the place of many types of computational and storage resources used today. In this regard, grid computing, on which the large scale supply of cloud services is based, will play a key role in defining how those services will be provided. this paper concerns the analysis and preliminary design of a real time financial system that relies on cloud computing technologies for performing macroeconomic analysis and forecasts of the financial markets and their instruments. Cloud and grid paradigms generate different added values. Some of these are examined in the paper, for instance the use of an Instruction Set to interact withthe Grid. this work uses the results obtained in the Cybersar Project managed by the COSMOLAB Consortium (Italy). the system analyzed and described herein will be implemented in the Cybersar Computational Grid by autumn 2009. Copyright 2009 acm.
this paper provides a new method for computing numerical approximations of the roots of a zero-dimensional system. It works on general systems, even those with multiple roots, and avoids any arbitrary choice of linear...
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ISBN:
(纸本)9781605586090
this paper provides a new method for computing numerical approximations of the roots of a zero-dimensional system. It works on general systems, even those with multiple roots, and avoids any arbitrary choice of linear combination of the multiplication operators. It works by computing eigenvectors (or a basis of the full invariant;subspaces). the sparsity/structure of the multiplication operators by one variable can also be taken into account.
Semantic technologies promise to solve challenging problems of current enterprise information systems, e.g., the integration of heterogeneous information clients and the evaluation of complex data dependencies. As man...
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ISBN:
(纸本)9781605581668
Semantic technologies promise to solve challenging problems of current enterprise information systems, e.g., the integration of heterogeneous information clients and the evaluation of complex data dependencies. As many of these problems also apply to coordination applications, recent research initiatives have proposed to integrate coordination models with semantic technology. In this paper, we present such an integrated coordination model which combines logic-based reasoning with a reliable semantic subscription mechanism. We present a formal definition of the model's behavioral semantics and investigate the added value of using semantic technologies. Finally, we draw first conclusions about the practical applicability of the proposed approach based on performance benchmarks of a prototype implementation. Copyright 2009 acm.
Opportunistic grids are a class of computational grids that can leverage the idle processing and storage capacity of shared workstations in laboratories, companies, and universities to perform useful computation. OppS...
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ISBN:
(纸本)9781605581668
Opportunistic grids are a class of computational grids that can leverage the idle processing and storage capacity of shared workstations in laboratories, companies, and universities to perform useful computation. OppStore is a middleware that allows using the free disk space of machines from an opportunistic grid for the distributed storage of application data. But when machines depart from the grid, it is necessary to reconstruct the fragments that were stored in that machines. Depending on the amount of stored data and the rate of machine departures, the generated traffic may make the distributed storage of data infeasible. In this work we present and evaluate a fragment recovery mechanism that makes viable to achieve redundancy and large data scale in a dynamic environment. Copyright 2009 acm.
this paper describes the agentTool Process Editor (APE), an Eclipse plug-in based on the Eclipse Process Framework. the aim of APE is to facilitate the design, verification, and management of custom agent-oriented sof...
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ISBN:
(纸本)9781605581668
this paper describes the agentTool Process Editor (APE), an Eclipse plug-in based on the Eclipse Process Framework. the aim of APE is to facilitate the design, verification, and management of custom agent-oriented software development processes. APE provides five basic structures. the Library is a repository of agent-oriented method fragments. A Process Editor allows the management of tailored processes. Task Constraints help process engineers specify guidelines to constrain how tasks can be assembled, while a Process Consistency mechanism verifies the consistency of tailored processes against those constraints. Finally, the Process Management integrates APE withthe agentTool III development environment and provides a way to measure project progress using Earned Value Analysis. Copyright 2009 acm.
the proceedings contain 407 papers. the topics discussed include: network protocol interoperability testing based on contextual signatures and passive testing;practical distributed voter-verifiable secret ballot syste...
ISBN:
(纸本)9781605581668
the proceedings contain 407 papers. the topics discussed include: network protocol interoperability testing based on contextual signatures and passive testing;practical distributed voter-verifiable secret ballot system;using geo-spatial session tagging for smart multicast session discovery;a holistic mechanism against file pollution in peer-to-peer networks;robust scheduler for grid networks;NECTAR: a DTN routing protocol based on neighborhood contact history;DoSTRACK: a system for defending against DoS attacks;secure routing in peer-to-peer distributed hash tables;BPR: a bit-level packet recovery in wireless sensor networks;multi-step attack modeling and simulation (MsAMS) framework based on mobile ambients;quality of service management in GMPLS-based grid OBS networks;new content-aware request distribution policies in web clusters providing multiple services;securing key issuing in peer-to-peer networks;preservation of ordering in a network of brokers;and developing and evaluating web multimodal interfaces a case study with usability principles.
Graphical User Interfaces (GUIs) of document viewers have gained attention withthe increase on the number of mobile applications that uses it. However, mobile devices are still limited in relation to the available fu...
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ISBN:
(纸本)9781605581668
Graphical User Interfaces (GUIs) of document viewers have gained attention withthe increase on the number of mobile applications that uses it. However, mobile devices are still limited in relation to the available functionalities for text exhibition. Other limitations of these devices are the memory size, processing capacity and battery. this paper describes a framework for text visualization that safely manages memory traffic for mobile applications that intensively use bitmap font files, such as a document viewer. the main goal is to diversify the functionalities concerning to text exhibition in mobile devices, but also minimizing memory traffic. Copyright 2009 acm.
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